How billet AR-15 receivers are made

SI Defense manufactures AR-15 lower and upper receivers that are machined out of solid aluminum billet blocks.

picture 12 21 How billet AR 15 receivers are made photo
Two soon-to-be receivers being sprayed with coolant by the CNC machine

They have photos of the process and a video showing the CNC machine in operation. Very interesting.

Thanks to Health for the link.

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2 Responses to “How billet AR-15 receivers are made”

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  1. Heathwrote on February 26th, 2009 at 5:09 pm Link To Comment | Reply To Comment

    I’d like to have one billet lower just because of the cool factor!

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  2. jdun1911wrote on February 26th, 2009 at 3:55 pm Link To Comment | Reply To Comment

    They should take full advantage of the billet 6061-T6 aluminum. It allows interesting designs to be produce.

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  1. Heathwrote on February 26th, 2009 at 5:09 pm Link To Comment | Reply To Comment

    I’d like to have one billet lower just because of the cool factor!

    Please rate this comment: Thumb up 0 Thumb down 0
  2. jdun1911wrote on February 26th, 2009 at 3:55 pm Link To Comment | Reply To Comment

    They should take full advantage of the billet 6061-T6 aluminum. It allows interesting designs to be produce.

    Please rate this comment: Thumb up 0 Thumb down 0

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